George carl vennttm



Dec. 13, 1927.

G. C. VENNUM WATER HEATER Filed July 29. 1921 Patented Dec'. 13, 1927.

` UNITED STATESl GEORGE CARL VENNUM, OF WESTFIELD, NEW JERSEY, `ASSIGNOIR. TO EDGE MOOR IRON i 1,652,188 PATENT oFFicE.

COMPANY, OF EDGE MOOR, DELAWARE, A CORPORATION OF DELAWARE.

. WATER HEATER.

Application filed July 29,1921. Serial No. 488,455.

ated closertogether, provide an ample andV covenient space'for the soot blowing nozzles. Another object which I have in View is to provide a construction which will enable me to build up a heater section formed of divisional header ends and in which it is'made practicable to diminish the size of the header ends over that commonly necessary by using,

in combination with the header ends, water.

tubes having contracted' ends. In this way I make it practicable to use la'rge diameter tubes and to space them in the gas pass so as to obtain a high ratio of tube surfacek to the gas pass area, an important feature of construction in view of the high pressures now coming into use. Still another object of my invention is to provide a construction in which the headers are made up of cylindrical header ends nested together in a highly convenient and practical manner.

The nature of my improvements will be best understood as described in connection Y. and

tionalunits 6-6 which, as'illustratedyare each of cylindrical formnested together,as

shown in Fig. 1, so that the alternate rowsl are staggered with respect vto each other. As shown, each row of cylindrical units is fastened together alternately by rivets, as indicatedv at 12, and by nipples, as indicated at 14, and the yends of the rowsare connected by nipples, as indicated at 16, 18 and 20 so as to provide asinuous path through the heater when the headers are connected by kwater tubes 8, the ends of which are con-` tracted, as shown inl Fig. 2, for the double purpose of providing spaces, indicated at l0.

for the insertion of soot blowing steam nozzles 40, provided, as is shown, with dis-V charge nipples 42. The nozzles, as shown,

vare connected with a steam supply pipe indicatedat 44. Another useful function, involved in the use 'of `the water tubes with `cont-acted ends, is that it enables me to con! struct and use header ends of smaller sizer than has heretofore been customary andnecessary owing to the Jfact that the tube holes provided in the header ends can be and are made smaller, thusproviding for a'wall of than'nsual standard size. The headers are, of course, provided with the usual hand holes whichare closed by covers of any convenient i construction. Conveniently, vthe heater section, made up, as shown, of four rows of header ends, is enclosed in a frame made up of plates 32 and 38. Y

24 indicates the water supply pipe connected by an inlet branch 22 with the first header section, and 26 is a branch pipe con- -suiiicientstrength ina header end of less v necting the vrear vheader section with the p water supply pipe; each branch pipe is provided with a valve indicated at 28, and a valve, indicated at 30, is located in the water supply pipe between its connection with the branch pipes. When the section is in operation, the valve 30 will, of course, be closed and the valves 28 open, and by closingthe valve 28 and yby opening the valve 30 the Y header section can be cut out.

vHaving now described my invention, what I claim as new 'and desireto secure'by Letters Patent, is: Y i

1. A steam boiler having in combination headers, spaced water tubes connectingsaid headers having contracted ends whereby enlarged spaces between the tubes are formedv adjacent tot-he headers and steam soot blowing nozzlesextending through said enlarged spaces. f Y 2. A steam boiler having headers made up vof cylindrical units nested together sothat Y alternate rows will be staggered, in combination with watertubes connecting opposite Y units of the headers nipple connections connecting adjacent header unitsyin pairs to provide for the desired circulation in the boiler and rivets securing adj acentinterconnected headers together.

GEORGE CARL vENNUM. f 

